GCpp library releases

to do:

• check dupplicates in tree structure, using GNamedList options

february 2020: version 1.2

• corrected bug in GIntervalList removal of first/last value december 2018: version 1.2
• bug corrected in GOptionString::OptArgument function october 2017: version 1.2
• all files grouped into one single final library
• added FFT classes: GBaseSampleFFT and GRealSampleFFT march 2017: version 1.2
• modified template functions calls for compatibilty with CentOS 7 compiler.

june 2015: version 1.1

• added bash environment configuration script

may 2014: version 1.1

• adding tree structure template classes: GTreeNodeT and derived classes GTreeBranchT and GTreeLeafT
• adding GItem class for reference to various objects
• adding tree structure classes for GItem

june 2013: version 1.0

• first release from previous codes, including list templates
• adding base classes for mathematics